Refrigerati no-chamber



Patented Oct. 25,1881.

Inh/ENTDB nllllllnllrlll (No Model.)

E. HAB/4111101@` REFRIGERATING CHAMBER.

UNITE@ STATES PATENT Ormea.

EDIVARD HAMILTON, OF BOSTON, MA SSAOHSETTS.

REFRIGERATING-CHAIVIBER.

SPECIFICATION forming part of Letters Patent No. 248,738, dated October 25. 1881.

Application filed September 5, 1881. (No model.)

To all whom it may concern Be it known that 1, EDWARD HAMILTON, of Boston,in the county of Suffolk and Gommonwealth ot'Massachusctts, a citizen ofthe United States, have invented a certain new and useful Improvement in Refrigerating-Chambers, of which the following is a t'ull, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification, in explaining its'nature, in which- Figure l is a view, part in plan and part in horizontal section, ofa car or chamber embracing my improvement. Figs. 2, 3, 4, 5,-6, 7, 8, 9, 10, 11, 13, and 14represent horizontal sections ofthe tanks employed, hereinafter more fully described. Fig. 12 is a vertical section of a tank, which is also hereinafter referred to.

My invention is especially adapted for use in refrigerating-cars, on vessels, and for large refrigeratingestablishmen ts, and itis an improvement upon that described in Letters PatentNo. 244,676, granted William Scott, assignor,dated July 19, 1881. In said patent there is shown and described a refrigerating-chamber having one or more ice-tanks, comprising a metallic shell corrugated on one or more sides, which corrugated portion is covered by a plate in such a manner as to provide chambers or ducts between the plate and the shell in which the air is cooled, and through which acoutinuous circulation of air is maintained.

My improvement consists in a modification in this construction, whereby larger ducts or chambers are obtained and the cost of manufacture cheapened. The use of corrugated metal for the purpose indicated is expensive, because it requires a much larger amount than is essential to provide suitable passages and strength, and also because it requires special machinery to form metal plate with corrugations of sufficient size to make large enough ducts or passages. I construct my tank or tanks with one or more exterior air ducts or chambers, a, of plate b, formed into a shell by bending to the required shape and riveting or otherwise fastening its edges, or ofindependent plates secured together, and the bent, curved, or straight plate c, fastened to one or more sides ofthe shell by riveting, or in any other way. In thisevent, ofcourse, thereis an opening into the passage or duct a from the chamber without, at both top and bottom ofthe tank.

Another forni of construction is that shown in Figs. 2, 4., 6, and S, in which the plates c. instead ot' being attached to the inner sides of the tank, are united together at their edges, or are in one piece, to form the shell of the tank, and are surrounded by a sleeve or casing, cl, which, however, does not extend to the top or bottom ot' the tank, leaving sufficient space for the air from the chamber or room to enter and leave the chamber or duct.

In Figs. 6, 7, 8, and 9 I show a detail in the construction in which the shell and sleeve are so arranged that the air-passages a occur at the corners instead of at the sides; and in Figs. 10, 11, and 13 I representa construction in which the outer surface of the tankis curved. This is easily accomplished by surrounding a tank substantially square in cross section by a cylindrical sleeve. /Vhichever ofvthese constructions is employed, the result is that the tank has one or more large exterior chambers or ducts, in which the air circulates and is brought in contact with a cooling-surface, and cheapness of construction and economy in the use of material is effected.

Another feature ot' my invention embraces the making of one side of the tank ofor lining the inner side with wood, in order that a surface may be provided against which the ice may be thrown or moved, when being put into the tank, without doing any injury to the tank. This wooden lining or surface,when used, I preferto locate upon theside next the end ofthe car.

The advantages of this invention are twofold: first, cheapness 'in construction is obtained, and, second, large chambers or ducts for the circulation of the air aboutthe coolingsurfaces are provided.

Of course any desirable metal may be used in making the shell, and the exterior casing or sleeve may or may not be metallic.

It will be observed that whichever of the details in construction herein described is employed in constructing the tank, the same effectis producednamely, that the tank is best disposed to obtainlargeexteriorchambersorducts, econolnyin material, and strength, and the lat ter elementis ofespecial importance, particularly when taken in connection with economy of IOO material. And this feature in detail, it will be observed, exists in Figs. 2, 3, 4, 5, 8, 9, and 10, because the inner parts of the tank-shell are bent or curved inwardly, and, in connection with the outer parts, form a truss construction or rigid stays, whereby great strength is attained. In Figs. C and 7 the saine result is effected, because the three sides y, andz form a rigid bracing or stay portion. In Figs. 10, 11, and 13 the etl'ectis also the same, the truss,7 it' so it may be called, or stay being upon the outside instead ot' upon the inside, as in Figs. 1, 2, 3, 4, 5, and 9.

Having thus fully described my invention, I claim and desire to secure by Letters Patent ofthe United States l. A refrigeratiiig-chamber, in combination with one or more ice-tanks having vertical passages upon one or more sides l'orin ed therein, substantially as deseiibed, and forthe purposes set forth.

2. A met-allie icetanl; consisting of a shell shaped upon one or more ot' its surfaces, as

shown, and a casing surrounding said shell in Whole or in part, and forming the Wide exterior airchamber, all substantially as and for the purposes described.

3. A metallic ice-tank consisting ofa shell having one or more air-chambers or ducts formed by the bent or curved plate or plates c, which are attached or fastened to the shell, all substantially as and for the purposes described.

4. A metallic ice-tank having one of its inner vertical faces of or lined with wood, substantially as and for the purposes described.

An ice-tank having one 0r more ofits sides formed by two sections, one of which is curved or bent to an angular form in relation to the oth er, and thereby re-en forces it,and at the same time provides the exterior chamber or duct, all substantially as and for the purposes described.

EDWARD HAMILTON.

\Vitnesses:

F. F. RAYMOND, 2d, FRED. HARRIs. 

